Stock units held in deferred phantom stock account under PACCAR Restricted Stock and Deferred Compensation Plan for Non-Employee Directors (RSDCP) convertible to common stock on a 1-for-1 basis upon termination of the Reporting Person's status as a non-employee director.

(2)

Dividend on stock units held in phantom stock account under RSDCP reinvested in additional stock units pursuant to RSDCP.